KR20240000965A - Brush-type cross hole deburring tool - Google Patents

Abstract

The present invention relates to a deburring tool, and more specifically, to a brush-type cross hole deburring tool that can easily remove burrs generated when drilling a cross hole with a brush without separate cutting processing. A brush-type cross hole deburring tool according to the present invention includes a shank portion (1) extending in the longitudinal direction; A head portion (2) provided on the outer peripheral surface of the end of the shank portion (1); A cross hole (CH) is formed to protrude on one side of the head portion (2) and is drilled to intersect the tubular body (P) while rotating in the circumferential direction of the inner peripheral surface of the tubular body (P) as the shank portion (1) rotates. It includes a polishing unit (3) provided with a plurality of brush wires (31) that polish the inner edge to remove burrs.

Description

Brush type cross hole deburring tool {BRUSH-TYPE CROSS HOLE DEBURRING TOOL}

The present invention relates to a deburring tool, and more specifically, to a brush-type cross hole deburring tool that can easily remove burrs generated when drilling a cross hole with a brush without separate cutting processing.

A cross hole refers to a hole drilled to intersect with a pipe body for the purpose of connecting another pipe to the pipe body, joining or processing other structures, etc. When drilling such a cross hole, a burr is generated on the inner edge of the cross hole. In order to remove such burrs, it was previously announced in Cited Document 1 (Korea Public Patent No. 10-2017-0072156) and Cited Document 2 (XEBEC company's deburring tool introduction video, https://www.youtube.com/watch?v=55xCGNKxiTQ). Various deburring tools as described have been proposed.

Figure 1 shows a schematic diagram of a cross hole (CH) deburring process using such a conventional deburring tool. This conventional deburring tool (1) is generally provided with one or more deburring blades at the end, and rotates the tool and simultaneously moves the deburring blade along the edge (E) contour of the cross hole (CH) (arrow in FIG. 1 The main method is to directly cut and remove the burr formed on the edge (E) of the cross hole (CH) while changing the direction. In order to automate such cutting operations, it is necessary to have a machining control program that stores data on the edge outline of the cross hole in advance and moves the tool corresponding to the stored edge outline of the cross hole. However, since the edge shape of the cross hole is not constant and consists of a three-dimensional curve, deburring along the shape contour requires complicated machining control programs and increased construction costs (when applying XEBEC's deburring tool, a separate purchase of a dedicated program is required). In addition, there is a disadvantage that it takes a lot of processing time. Because of these difficulties, deburring is often done with a brush. In the case of deburring with a brush, the cutting force is weaker than that of a tool equipped with a deburring blade, and because uniform cutting is not performed on the edge contour of the cross hole, there is a disadvantage in that burrs remain.

In order to solve these problems of the conventional cross hole deburring tool, the present inventor has proposed a cross hole deburring tool with a new structure in Republic of Korea Patent No. 10-2255991. The registered patent includes, as shown in FIG. 2, a shank portion 110 extending in the longitudinal direction; A body portion 120 provided on the outer peripheral surface of the end of the shank portion 110; A cross hole ( It includes a cutting part 130 that chamfers the inner edge of CH); The cutting portion 130 protrudes from one side of the body portion 120 and has a convexly curved cutting surface 134a formed at the longitudinal end. The deburring tool according to the above registered patent can remove burrs all at once by chamber processing the entire edge of the cross hole by simply rotating it once along the inner circumferential surface of the pipe body without moving the tool along the edge contour of the cross hole, thereby reducing work time and reducing work time. Quality improvement can be achieved, and deburring processing is possible without establishing a separate processing control program, which has the advantage of reducing equipment costs.

However, the deburring tool according to the registered patent cannot universally use the shape of the cutting surface 134a of the cutting part 130, and a cutting tool suitable for the cross hole is then made through separate design and processing work depending on the shape of the cross hole. There is an inconvenience in having to produce it at that time. For this purpose, processing using dedicated tools is required, and cutting edge processing is also required, which has the disadvantage of high work difficulty. In addition, since it is a type that removes burrs by cutting them, chattering occurs on the machined surface due to vibration depending on the situation, and manufacturing costs increase because expensive materials such as PCD must be used, and the tool needs to enter the cross hole and move offset. Therefore, caution is required when setting up CNC equipment.

In addition, as shown in FIG. 3, a tool is known for deburring a plurality of wire bundles by inserting them into the tube body and rotating them at high speed to strike the wires to the side. According to this tool, scratches and damage to the hole wall are possible. There is a disadvantage that it cannot be used in precision machining areas because it occurs frequently, and there is a problem that the deburring effect is weak because burrs are removed using the side rotational force of the wire.

Meanwhile, as shown in FIG. 4, there is a known deburring tool using a general radial brush, but these tools also frequently have scratches and damage problems on the hole wall, making them impossible to use in precision machining areas, and burr removal. Since the same brush pressure is applied to areas other than the area, there is also a disadvantage in that the deburring effect is weak.

Republic of Korea Open Patent 10-2017-0072156 Republic of Korea registered patent 10-2255991

https://www.youtube.com/watch?v=55xCGNKxiTQ

The present invention was created to solve the problems of the conventional cross hole deburring tool as described above. Instead of moving the tool along the edge contour of the cross hole, the present invention simply rotates the tool along the inner circumferential direction of the pipe body (P). The purpose is to provide a cross hole deburring tool that can reduce work time and improve quality by removing burrs all at once by grinding the entire edge of the hole.

A brush-type cross hole deburring tool according to the present invention for achieving the above-described object includes a shank portion (1) extending in the longitudinal direction; A head portion (2) provided on the outer peripheral surface of the end of the shank portion (1); A cross hole (CH) is formed to protrude on one side of the head portion (2) and is drilled to intersect the tubular body (P) while rotating in the circumferential direction of the inner peripheral surface of the tubular body (P) as the shank portion (1) rotates. It includes a polishing unit (3) provided with a plurality of brush wires (31) that polish the inner edge to remove burrs.

Here, the polishing part 3 is formed by protruding a plurality of brush wires 31 planted on one side of the edge of the head part 2.

In addition, the polishing unit 3 is configured to have an arch shape in which the central portion is more convexly curved than the left and right sides so that the entire edge of the curved cross hole (CH) can be smoothly polished to remove burrs. Preferably, for this purpose, the length of the individual brush wires 31 constituting the polishing part 3 increases in length toward the center in the length direction of the shank part 1, and the brush wires belonging to the same row in the width direction ( 31) It is preferable that the lengths are the same.

According to the present invention as described above, the chattering phenomenon that may occur during cutting does not occur and the polishing effect at the corner of the cross hole can be achieved. In addition, one tool can be used for cross holes of similar size and the design difficulty is low. Additionally, it is possible to apply relatively inexpensive materials by using existing general-purpose wire materials. In addition, since burrs are removed directly by striking the end surface of the brush wire, the deburring strength and effect are significantly superior to tools that remove burrs by striking the side of the wire. In addition, as the tool is moved within the pipe body, holes of similar size formed near the machined cross hole can be immediately deburred, providing excellent versatility. The tool's entry and offset movement, approach to the machining part, and rotation operation are all performed by CNC equipment, so there is less risk of interference or damage between the pipe body (P) and the tool, and the intensity of the deburring effect is controlled by adjusting the access gap to the machining part. This is possible and has the advantage of being easy to set up CNC equipment.

1 is a schematic diagram of a deburring process using a conventional cross hole deburring tool;
Figure 2 is a diagram showing the structure and working method of a deburring tool according to Patent No. 10-2255991;
Figure 3 is a photograph showing the structure and working method of a conventional deburring tool using a wire bundle;
Figure 4 is a photograph showing the structure and working method of a dabbering tool using a conventional radial brush;
5 is a perspective view of a deburring tool according to the present invention;
Figure 6 is a cross-sectional view of the deburring tool according to the present invention being used while mounted on processing equipment;
Figure 7 is a process diagram sequentially showing a cross hole deburring work method using a deburring tool according to the present invention.

Hereinafter, the configuration and operation of the brush-type cross hole deburring tool according to the present invention will be described in detail with reference to the attached drawings and preferred embodiments.

As shown in FIGS. 5 to 7, the brush-type cross hole deburring tool 10 according to the present invention is configured to include a shank portion 1, a head portion 2, and a polishing portion 3.

The shank part (1) is a part for mounting and coupling the tool according to the present invention to the spindle (S) of the processing equipment and also supporting the head part (2), which will be described later, and, as shown, extends long in the longitudinal direction. It is formed and generally consists of a rod shape with a circular cross section. As shown in FIG. 6, the shank portion 1 is coupled to the spindle S of the processing equipment by a jaw or other coupler and rotates together with the rotation of the spindle S.

The head portion 2 is a block body formed at the end of the shank portion 1 and is provided with a polishing portion 3 to be described later on one side. As shown, the head portion 2 is generally composed of a block body with a square or pentagonal cross-section, but is not limited to this, and has a structure having a vertical plane on which a plurality of brush wires 31 can be planted on one side. There will be no restrictions. In addition, it is preferable that the four corners of the head portion 2 are chamfered or rounded to avoid interference with the inner peripheral surface of the pipe body P during processing. The head part 2 may be formed integrally with the shank part 1, but a hole corresponding to the diameter of the shank part 110 is formed through the central part of the block body, and the shank part 1 is formed here. It is preferable to be inserted and coupled by pressure fitting, or to be firmly fixed and coupled by welding, blazing, or other fasteners.

The polishing part 3 is a part that removes burrs by grinding the entire inner edge of the cross hole (CH) drilled to intersect the pipe body (P) with a plurality of brush wires (31). As shown, the head A plurality of brush wires 31 are planted on one side of the edge of the part 2 to protrude. The brush wire 31 constituting the polishing unit 3 may be made of various materials such as synthetic resin or metal, and can be used to process various materials by changing the material, and the brush wire 31 can be used as a head. The unit may be configured to be replaceable. Meanwhile, the polishing unit 3 is configured to have an arch shape in which the central portion is more convexly curved than the left and right sides so that the entire edge of the curved cross hole (CH) can be smoothly polished to remove burrs. desirable. That is, the length of the individual brush wires 31 constituting the polishing unit 3 becomes longer toward the center in the longitudinal direction (shank length direction), and the length of the brush wires 31 belonging to the same row in the width direction increases. It is desirable that the lengths are configured to be the same.

The polishing unit 3 rubs a plurality of brush wires 31 against the edges of the cross hole to remove burrs and polish (wear) the edges. Accordingly, the chattering phenomenon that can occur during cutting does not occur and the polishing effect at the corners of the cross hole can be achieved. In addition, one tool can be used for cross holes of similar size and the design difficulty is low. Additionally, it is possible to apply relatively inexpensive materials by using existing general-purpose wire materials.

In Figure 7, a deburring work process using a brush-type cross hole deburring tool according to the present invention is sequentially shown. As shown in (a) of FIG. 7, the brush-type cross hole deburring tool according to the present invention is inserted into the hollow interior of the tubular body (P) in the longitudinal direction. At this time, the tool is inserted offset from the center of the pipe body (P). That is, the end of the polishing part 3 does not contact the cross hole CH and the head part 2 also enters in a spaced state so as not to contact the wall surface of the tube body P, so that the inner wall of the tube body P Make sure damage is prevented. Because the polishing part 3 has an asymmetric structure formed on only one side, offset entry within the pipe body P is possible, and thus the entry diameter is smaller than that of existing tools, which is advantageous. After the polishing portion 3 of the tool enters the position corresponding to the cross hole CH, as shown in (b) of FIG. 7, the polishing portion 3 is applied to the edge processing portion of the cross hole CH. After approaching, rotate the tool and strike the end face of the wire to directly remove the burr. Since the burr is removed directly by hitting the end surface of the wire in this way, the deburring strength and effect are significantly superior compared to a conventional deburring tool that removes the burr by hitting the side of the wire, as shown in FIG. 3. Meanwhile, as shown in (c) of FIG. 7, as the tool is moved, holes of similar size formed near the machined cross hole can be immediately deburred, thus providing excellent versatility. The tool's entry and offset movement, approach to the machining part, and rotation operation are all performed by CNC equipment, so there is less risk of interference or damage between the pipe body (P) and the tool, and the intensity of the deburring effect is controlled by adjusting the access gap to the machining part. This is possible and has the advantage of being easy to set up CNC equipment.

Above, specific embodiments of the present invention have been described. However, the spirit and scope of the present invention are not limited to these specific embodiments, and it is known by common knowledge in the technical field to which the present invention pertains that various modifications and variations can be made without changing the gist of the present invention. Anyone who has it will understand. The embodiments described above are provided to fully inform those skilled in the art of the present invention of the scope of the invention, and should be understood as illustrative in all respects and not restrictive, and the present invention is only defined by the scope of the claims.

1: Shank part 2: Head part
3: Polishing part 31: Brush wire
P: Tube CH: Cross Hole

Claims (4)

A shank portion (1) extending in the longitudinal direction;
A head portion (2) provided on the outer peripheral surface of the end of the shank portion (1);
A cross hole (CH) is formed protruding on one side of the head portion (2) and is drilled to intersect the tubular body (P) while rotating in the circumferential direction of the inner peripheral surface of the tubular body (P) as the shank portion (1) rotates. A brush-type cross hole deburring tool including a polishing section (3) equipped with a plurality of brush wires (31) that polish the inner edge to remove burrs. According to claim 1,
The polishing unit 3 is,
A brush-type cross hole deburring tool, characterized in that a plurality of brush wires (31) are planted and protruded on one side of the edge of the head portion (2). According to claim 2,
The polishing unit 3 is characterized in that the end outline shape is an arch shape in which the central portion is more convexly curved than the left and right sides so that the entire edge of the curved cross hole (CH) can be smoothly polished to remove burrs. Brush type cross hole deburring tool. In the third,
The length of the individual brush wires 31 constituting the polishing unit 3 becomes longer toward the center in the length direction of the shank unit 1, and the lengths of the brush wires 31 belonging to the same row in the width direction are Brush type cross hole deburring tools characterized in that they are configured identically to each other.

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